Cape Henlopen State Park

Cape Henlopen State Park is a Delaware state park located near the town of Lewes, in Sussex County, at the point where the Delaware Bay meets the Atlantic Ocean. Spanning roughly 7,000 acres, the park offers visitors the opportunity to swim in the ocean, bike through the sand dunes, fish from the bayside fishing pier, and camp beside historical World War II-era observation towers, all while enjoying a unique combination of natural wonders and cultural history. The park's origins as a public space date back to 1682, making it one of the oldest protected public lands in what would become the United States, though it did not receive its official designation as a Delaware state park until 1964.

History

Cape Henlopen's history stretches back thousands of years, starting as a land rich in resources for Native Americans, before becoming a strategic site granted by William Penn for public use in the 1600s. William Penn, the founder of Pennsylvania and early leader of Delaware, decreed that Cape Henlopen and its natural resources be set aside for the use and enjoyment of the citizens of the Delaware Colony — a decree that established Cape Henlopen as one of the first public use parcels of land in the Thirteen Colonies. The name of the cape itself reflects its colonial-era roots: Cape Henlopen was originally spelled "Cape Hinlopen," named after Thijmen Jacobsz Hinlopen, a prominent Dutch trader, and marked New Netherland's southernmost border on the 37th parallel north.

The park's critical location at the mouth of Delaware Bay made it a strategic site for military operations and research from the Revolutionary War through the Cold War. As interpretive program manager Kaitlyn Dykes of the Delaware Department of Natural Resources and Environmental Control has noted, the same strategic location that made it a great spot for a fort in World War II also made it ideal for a Navy headquarters during World War I, a quarantine station in the 1800s, and cannon emplacements during the American Revolution. The quarantine station, which operated during the nineteenth century, reflects the cape's long role as a gateway and chokepoint for maritime traffic entering Delaware Bay — a function that brought both commercial and public health significance to the site.

Cape Henlopen Light, the sixth lighthouse built on the Atlantic Coast, was constructed from 1767 to 1769. It remained in operation until 1924, when it was abandoned following extensive storm damage sustained in 1920. The lighthouse ultimately fell into the Atlantic Ocean on April 13, 1926, and its ruins remain on the ocean floor today.

In 1964, Cape Henlopen State Park was officially dedicated following the purchase of 1,641 acres of land from the U.S. Department of Defense, and the park has continued to grow in size and popularity ever since.

Fort Miles and World War II Heritage

Among the most distinctive features of Cape Henlopen State Park is its well-preserved World War II military heritage. During World War II, the U.S. Army built Fort Miles at Cape Henlopen, and numerous bunkers, concrete observation towers, and the pier built to accommodate the laying of mines on the harbor floor remain today. Within the park grounds are a handful of fire control towers from that era, as well as underground gun batteries intended for use against potential air and naval attacks.

Fort Miles became operational on December 4, 1941, just three days before the attack on Pearl Harbor. At the time, the German fleet was a legitimate threat to U.S. shipping and the American coastline — in the first half of 1942 alone, German U-boats sank 14 ships off the coast of New Jersey. After World War II, the military used Fort Miles primarily as a recreation area, until the fort officially closed in 1991.

Now designated a walkable artillery park, historical area, and museum with multiple buildings and areas to tour, the Fort Miles Historical Area is a cornerstone of the nation's coastal defense story. The Fort Miles Museum is housed in Battery 519, one of many underground bunkers throughout the park. Battery 519 itself is a massive concrete structure that once held 16-inch guns capable of firing shells weighing nearly a ton over distances of more than 25 miles — the scale of the installation underscores how seriously military planners regarded the threat of enemy naval bombardment along the Delaware coastline.

The Seaside Nature Center, now home to a touch tank and interactive exhibits, was once the prison for Fort Miles. When German soldiers were captured in Delaware Bay in 1945, they were briefly held there before being transferred north to Fort DuPont.

Natural Environment and Wildlife

Located at the point where the Delaware Bay meets the Atlantic Ocean, Cape Henlopen offers a unique combination of natural habitats and cultural history, with its coastal environment encompassing ocean and bay beaches, maritime forests, and tidal salt marshes. This convergence of ecosystems in a relatively compact area creates exceptional biodiversity, drawing naturalists, birders, and researchers throughout the year.

Cape Henlopen State Park is home to a wide array of wildlife, notably several species of shorebird. The black skimmer, least tern, and piping plover are all species of conservation concern that nest within the park, and horseshoe crabs are also very common, especially along the Delaware Bay shoreline. Each spring, Delaware Bay hosts one of the largest horseshoe crab spawning events in the world, an event that in turn draws large concentrations of migratory shorebirds that depend on horseshoe crab eggs as a critical food source. To protect nesting and migrating birds, the Delaware Department of Natural Resources and Environmental Control (DNREC) closes The Point at Cape Henlopen each year beginning March 1. In June and July, additional small sections of the park's beach may be closed to protect endangered shorebird nesting areas.

The park is also home to marine mammals, particularly gray seals, which are occasionally found along the park's beaches. The Marine Education, Research and Rehabilitation (MERR) Institute, a Delaware-based nonprofit, responds to stranded and injured marine mammals at Cape Henlopen, including a gray seal pup rescued after being found entangled in apparent fishing gear along the park's shoreline.

The only publicly-owned wild beach in Delaware to include dune and marsh habitats, Beach Plum Nature Preserve within the park is an important habitat for shorebirds and horseshoe crabs. A small portion of the beachfront allows surf-fishing access, and a pedestrian-only trail allows for exploration, but the majority of this wild space is off-limits to the public for wildlife conservation. Bird watching is a year-round draw, and the Hawk Watch offers an elevated vantage point for scenic views and the opportunity to watch the natural birdlife around the bay area, as well as a chance to spot dolphins and other marine life.

Recreation and Trails

Cape Henlopen's pristine beaches, mature maritime forests, prime nesting habitat, and abundant wildlife make it a popular destination for outdoor enthusiasts. Visitors can enjoy diverse habitats, the Seaside Nature Center and Fort Miles Historical Area, as well as extensive bike paths and both ocean and bay beaches.

The park features eight distinct trails suited to a range of abilities and interests. The Gordons Pond Trail, a 3.2-mile accessible path, offers views of dunes, forests, and wetlands, while the Junction and Breakwater Trail provides 5.8 miles of scenic terrain for those seeking a longer adventure. The Walking Dunes Trail is a 2.6-mile loop trail near Lewes that is suitable for all skill levels and is accessible year-round, passing through impressive sand dunes that offer expansive views of the surrounding coastal landscape. In total, there are 10 miles of biking trails in Cape Henlopen State Park, ranging from easy rides on asphalt with views of salt marsh and dunes to more challenging dirt trails through forested terrain.

Cape Henlopen State Park serves as the eastern terminus of the American Discovery Trail, the only transcontinental trail in the United States. The entire American Discovery Trail runs from Cape Henlopen to San Francisco, and the Delaware portion of the trail bisects the state.

Fishing is another major draw at the park. The quarter-mile fishing pier offers convenient access to Delaware Bay, and visitors are advised to carry the necessary licenses before fishing. Popular catches from the Delaware Bay and ocean include sea bass and bluefish. Visitors may also drive onto the beach for surf fishing after receiving a permit from park authorities, and access over the dunes is open to pedestrians at all times. However, portions of the fishing pier have been subject to periodic closures due to structural deterioration; as of 2026, more areas of the pier were closed to public access while repair and assessment work continued.

The park's beaches are well suited for swimming, kayaking, paddleboarding, and fishing. Visitors can rent a canoe or kayak to explore the park's waterways, or try clamming and windsurfing for a more active experience on the water. Beach combing is also popular along Cape Henlopen's shoreline, with visitors regularly finding sea glass, shells, and rocks including red jasper among the surf-worn material deposited by Delaware Bay currents.

Metal Detecting

Metal detecting is permitted in Cape Henlopen State Park on certain ocean beaches east of the dune line during designated hours, subject to Delaware state park regulations. Detecting is not permitted in the Lewes area of the park, which encompasses ground that has historically served as a burial site for sailors and victims of shipwrecks — a restriction reflecting both respect for the dead and the archaeological sensitivity of the site. Visitors planning to bring metal detection equipment should confirm current rules with park staff, as designated areas and permitted hours are subject to change by park management.

Camping and Visitor Amenities

Cape Henlopen State Park offers a variety of camping opportunities, from RV and tent camping to rustic cabins. The cabins feature electricity, air-conditioning, and refrigerators, and can accommodate up to six people — situated on the edge of the campground for a secluded retreat after a day of exploring.

The campground offers water, 30-, 50-, and 100-amp electric hook-ups, fire rings and picnic tables, a one-way vehicle circulation pattern, a camp store, a laundry facility, pull-through sites, walk-in tent sites, a play area, dump stations, and a renovated registration booth. The campground at Cape Henlopen is open year-round.

The Seaside Nature Center is a staple of Cape Henlopen visits, featuring a 500-gallon touch tank, five 1,000-gallon exhibit tanks showcasing local species and habitats, a live Osprey camera feed, an instructional classroom, and a retail shop. The park's borrow-a-